A new synthesis of 5-methylene-2(5H)-furanone derivatives
作者:Roberto Antonioletti、Maurizio D'Auria、Antonella De Mico、Giovanni Piancatelli、Arrigo Scettri
DOI:10.1016/s0040-4020(01)88810-4
日期:1984.1
5-methylene-2(5H)-furanonederivatives are easily obtained by treatment of tertiary 2-furylcarbinols with pyridinium dichromate in dimethylformamide solution. Through this procedure, a natural product, the thiophene lactone isolated from Chamaemelum Nobile L., has been synthesized.
A chiral N,N′-dioxide/cobalt(II) complex catalyzed highly diastereoselective and enantioselective tandem aza-Piancatelli rearrangement/intramolecular Diels–Alderreaction has been disclosed. Various valuable hexahydro-2a,5-epoxycyclopenta[cd]isoindoles bearing six contiguous stereocenters have been obtained in good yields with excellent diastereo- and enantio-selectivities from a wide range of both
已公开了一种手性N,N'-二氧化物/钴(II)配合物,催化高度非对映选择性和对映选择性的串联氮杂-Piancatelli重排/分子内狄尔斯-阿尔德反应。从各种现成的2-呋喃基甲醇和N-(呋喃-2)中,以良好的收率获得了具有六个非连续立体中心的高收率的各种有价值的六氢-2 a,5-环氧环戊基[ cd ]异吲哚,并具有六个连续的立体中心。-基甲基)苯胺。
An efficient organocatalyticenantioselective aza‐Piancatelli rearrangement is disclosed. The powerful process provides rapid access to valuable chiral 4‐amino‐2‐cyclopentenone building blocks from readily available 2‐furfurylcarbinols with excellent chemo‐, enantio‐, and diastereoselectivities under mild reaction conditions.
申请人:Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
公开号:US10562837B2
公开(公告)日:2020-02-18
The invention relates to a method for preparing a compound comprising two phenyl groups by reacting a bisfuranic compound with a dienophile; and to such compounds.